Let X = the time between two successive arrivals (in minutes) at a drive thru window....

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Let X = the time between two successive arrivals (in minutes) at a drive thru window....

Let X = the time between two successive arrivals (in minutes) at a drive thru window. Suppose X is exponentially distributed, and that the average time between successive arrivals at the drive thru window is 1.2 minutes.

What is the value of lambda, the parameter of exponential distribution?

What is the probability that the next drive thru arrival is between 1 to 4 minutes from now?

What is the probability that the next drive thru arrival is greater than 2 minutes from now given that it has been 1.5 minute since the last drive thru customer arrived?

math Statistics-And-Probability

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